M32yoshka

Platform: CUSTOM | Category: Crypto | Type: Challenge | Difficulty: Easy | OS: N/A | **Author: XESXOR Techniques: Base32 decoding, Nested encoding detection, Repeated unicode_escape decoding

Summary

Walkthrough of the CUSTOM Crypto M32yoshka. Task: Decode nested encoding (matryoshka-style). Solution: Base32 decode followed by 3 layers of unicode_escape decoding to reveal the flag.

Description

Nested encoding: Base32 → 3 layers of \xNN hex escapes.

Solution

base32decode → unicode_escape × 3 → 'Yep! The flag is REDACTED' ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍

Key Takeaways / Lessons

• Mastering Base32 decoding, Nested encoding detection, Repeated unicode_escape decoding was key to this challenge.
• Always check for common misconfigurations and verify assumptions.

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Crafted by XESXOR Research • 2026-03-08 • CUSTOM • M32yoshka • Difficulty: Easy